JP6338940B2 - Automobile air cleaner mounting structure - Google Patents

Description

The present invention relates to a structure for mounting an air cleaner, which is connected to a longitudinal engine mounted between a left and right side member with a crankshaft facing in the vehicle front-rear direction, via an intake manifold to the side member.

As a conventional structure in which an air cleaner connected to a vertical engine mounted between left and right side members extending in the longitudinal direction of the vehicle via an intake manifold is attached to the side member, for example, Patent Document 1 discloses the air cleaner as described above. A structure to be attached to the upper surface of the side member is disclosed.

Japanese Patent Laid-Open No. 2005-1407

In the conventional structure, since the air cleaner is attached to the upper surface of the side member, the lower portion of the center line of the air cleaner is supported by the side member, and the air cleaner that tends to increase due to the rotational torque and vibration around the crankshaft of the vertical engine This is advantageous in terms of suppressing vibration, twisting, and displacement of the center of gravity line portion.

The center-of-gravity line referred to in this specification means a line that passes through the center of gravity of an object such as vibration and is substantially parallel to the crankshaft of the vertically placed engine. Since the vibration of the center of gravity line portion of the object tends to increase, it is said that the vibration of the object can be greatly suppressed by providing the attachment point of the object on or near the center of gravity line.

In the conventional structure, the air cleaner is attached to the side member from the lower side of the vehicle body. However, if the air cleaner is attached from the lower side, the side member becomes an obstacle, and there is a problem that the workability of the attachment is poor.

Further, a harness or the like is often routed on the upper surface of the side member, and therefore there is a problem that it is difficult to secure a space for arranging the air cleaner on the upper surface of the side member.

If the air cleaner is arranged on the side of the side member, the above problem can be avoided. However, in this case, the center line of the air cleaner is separated from the attachment point, and there arises a problem that the vibration, torsion, and displacement of the air cleaner are likely to increase due to the rotational torque and vibration of the engine.

In order to avoid this problem, if a large and high-rigidity bracket that allows the attachment point to be close to the center-of-gravity line is provided on the side member, there arises a problem that the cost and weight increase and the productivity deteriorates.

The present invention has been made in view of the above-described conventional situation, and the attachment point of the air cleaner can be brought close to the center of gravity line without requiring a large and highly rigid bracket, and the vibration of the air cleaner due to the rotational torque and vibration of the engine, An object of the present invention is to provide an automobile air cleaner mounting structure capable of suppressing twisting and displacement.

In the present invention, an engine is mounted between left and right side members extending in the vehicle front-rear direction and bent in the vehicle width direction inward or outward, with the crankshaft directed in the vehicle front-rear direction, and coupled to the engine In the air cleaner mounting structure of an automobile that is mounted on the side of the left or right side member,
The bent portion is bent in a direction passing through the center of gravity of the air cleaner and close to a center of gravity line substantially parallel to the crankshaft, and a front portion of the air cleaner is attached to the bent portion.

According to the present invention, the front part of the air cleaner is attached to a bent part that bends in a direction close to the center of gravity line, so that the attachment point of the front part is compared with, for example, a case where the attachment point is on a straight part following the bent part. The center of gravity line where the vibration, twisting, and displacement of the air cleaner, which tends to increase due to the rotational torque and vibration of the engine, can be suppressed by the front mounting point. Can be suppressed.

In addition, because of the side member structure, it is possible to bring the attachment point closer to the priority line without the need for a large, high-rigidity bracket by using the conventional bends, increasing costs and weight, and increasing production. It does not cause sexual deterioration.

Furthermore, since the air cleaner is attached to the side of the side member, the side member does not get in the way when the air cleaner is attached from below the vehicle, and the attachment workability can be improved. In addition, it is easy to secure a component arrangement space such as harness wiring on the upper surface of the air cleaner.

It is a top view which shows typically the arrangement | positioning relationship between the engine and air cleaner in the air cleaner attachment structure which concerns on Example 1 of this invention. It is a top view of the said air cleaner attachment structure. It is a side view of the said air cleaner attachment structure. FIG. 4 is a sectional rear view of the air cleaner mounting structure (sectional view taken along line IV-IV in FIG. 2).

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

FIGS. 1-4 is a figure for demonstrating the air cleaner attachment structure of the truck based on Example 1 of this invention.

In the figure, reference numeral 1 denotes a truck body frame having the structure of this embodiment. The vehicle body frame 1 includes a pair of left and right side members 2 and 2 extending in the vehicle front-rear direction, a front cross member 3 connecting the front end portions of the left and right side members 2 and 2, and intermediate portions And a center cross member 4 for connecting the two. The side member 2 includes a rear portion 2a on which the loading platform 1a is mounted, and a front portion 2b that is formed to be narrower than the rear portion 2a and on which the cabin 1b is mounted, and a boundary portion between the rear portion 2a and the front portion 2b. Is a bent portion 2c that bends inward in the vehicle width direction from the rear portion 2a, in other words, outward in the vehicle width direction from the front portion 2b. The rear half of the rear part 2a is bent upward so as to be positioned higher than the front part 2b when viewed from the side of the vehicle.

  A power unit 5 is mounted between the left and right side members 2 and 2. The power unit 5 includes an engine 6, a transmission 7 connected to the output side of the engine 6, an intake system 8 connected to the intake side, and an exhaust system (not shown) connected to the exhaust side. Have Reference numeral 9 denotes a rear wheel drive shaft.

The engine 6 is a vertical engine mounted with its crankshaft oriented in the vehicle front-rear direction, and is mounted with its cylinder axis raised several degrees from the horizontal and the intake port facing upward.

The intake system 8 includes a metal intake manifold 10 connected to the intake port of the engine 6, an air cleaner body 11 connected to the intake manifold 10 via a resin joint duct 11 a, and the air cleaner body 11. And an intake duct 11b connected to the. The air cleaner body 11 and the intake duct 11b are arranged along the rear part 2a of the right side member 2 and so as to be located inward of the rear part 2a in the vehicle width direction.

The air cleaner body 11 has a filter element (not shown) disposed in a box-shaped casing 11 ', and front and rear lower mounting brackets 11d and 11d are provided at the lower part of the right side wall 11c of the casing 11'. Is integrally formed, and an upper surface mounting bracket 11f is integrally formed in the vicinity of the front right corner portion of the upper wall 11e.

The lower mounting brackets 11d, 11d are fastened and fixed to the bottom wall 2d of the rear portion 2a of the right side member 2 by bolts 12a inserted from below. Further, the upper surface mounting bracket 11f is welded and fixed to the upper wall 2e of the bent portion 2c of the right side member 2, and is fastened and fixed by a bolt 12b inserted from below into a main body support bracket 2f extending obliquely inward in the vehicle width direction. Has been.

The intake duct 11b extends rearward of the vehicle through the lower side of the cross member 4, and the upstream end 11g is connected and fixed so as to communicate with the side member 2. Further, an intake sound absorbing resonator 11h is formed in the middle of the intake duct 11b, and a duct mounting bracket 11i formed in the vicinity of the resonator 11h is disposed below the duct support bracket 4a formed on the cross member 4. It is fastened and fixed by a bolt 12c inserted from the above.

Here, the bent portion 2c passes through the center of gravity G of the joint duct 11a, the air cleaner main body 11 and the intake duct 11b of the intake system 8 in the present embodiment, and approaches the center of gravity line L extending substantially parallel to the crankshaft. Bent in the direction. Note that the center of gravity G of the intake system 8 of the present embodiment is located in the vicinity of the connection point between the air cleaner body 11 and the intake duct 11b as shown in FIG. 2 in a plan view and as shown in FIG. 4 in a cross-sectional view. It is located slightly above 11b.

The main body support bracket 2f is fixed to the bent portion 2c so as to be positioned on the outer side in the vehicle width direction and in the vicinity of the center of gravity line L, and extends in the direction of the center of gravity line L. A mounting bracket 11f is fixed via a pin 12b implanted in the support bracket 2f. Therefore, the attachment point of the upper surface mounting bracket 11f, that is, the connecting portion by the pin 12b is located near the outside in the vehicle width direction of the center of gravity line L.

The duct support bracket 4a is located on the inner side in the vehicle width direction and in the vicinity thereof with respect to the center of gravity line L, and the duct mounting bracket 11i of the intake duct 11b is fixed to the duct support bracket 4a with bolts 12c. Accordingly, the attachment point of the duct attachment bracket 11i, that is, the joint portion by the bolt 12c is located in the vicinity of the center of gravity line L in the vehicle width direction.

Thus, in the present embodiment, the main body support bracket 2f is fixed to the bent portion 2c bent in the direction approaching the center of gravity line L so as to be positioned in the vicinity of the center of gravity line L, and the main body support bracket 2f is Since the upper surface mounting bracket 11f is mounted, the mounting point of the upper surface mounting bracket 11f is located in the vicinity of the center of gravity line L, and vibration, displacement, and displacement of the air cleaner body 11 due to rotational torque and vibration of the engine 6 are detected. The upper portion of the center of gravity line that tends to become large can be suppressed by the upper surface mounting bracket 11f, and the displacement of the air cleaner body 11 and the intake duct 11b can be suppressed accordingly.

Further, the duct support bracket 4a is formed in the vicinity of the barycentric line L, and the duct mounting bracket 11i of the intake duct 11b is fixed to the duct support bracket 4a, which is caused by the rotational torque of the engine 6 of the intake duct 11b and the like. Vibration, torsion, displacement and the like can be suppressed.

In addition, the front part of the air cleaner body 11 is attached near the outside in the vehicle width direction of the center of gravity line L, and the middle part of the intake duct 11b is attached near the inside of the center of gravity line L in the vehicle width direction. Since they are attached at positions opposite to each other, vibration, torsion, displacement, and the like due to the rotational torque of the engine 6 can be suppressed also from this point.

Furthermore, since the air cleaner body 11 is mounted so that the side member 2 is sandwiched from above and below by the upper surface mounting bracket 11f and the lower mounting brackets 11d and 11d, vibration, displacement, and the like of the air cleaner body 11 can be more reliably suppressed.

Thus, since vibration, twist, displacement, etc. of the intake system 8 can be suppressed, it is possible to suppress transmission of these vibrations to the vehicle body.

Further, due to the structure of the side member 2, the use of the bent portion 2 c provided in the past makes it possible to bring the attachment point close to the center of gravity line L without the need for a large, high-rigidity bracket. Increase in productivity and productivity.

Further, since the intake system 8 such as the air cleaner body 11 is attached to the side of the side member 2, the side member 2 does not get in the way when the air cleaner is attached from below the vehicle, and the attachment workability can be improved. In addition, it is easy to secure a component arrangement space such as harness wiring on the upper surface of the side member 2.

2 Side member 2c Bent part 6 Engine 11 Air cleaner body 11b Intake duct 11f Upper surface mounting bracket (front part of air cleaner)
L Center of gravity line

Claims (1)

An engine is mounted between the left and right side members that extend in the vehicle longitudinal direction and bends inward or outward in the vehicle width direction with the crankshaft directed in the vehicle longitudinal direction. In the air cleaner mounting structure of an automobile attached to the side of either the left or right side member,
The bent portion is bent in a direction close to a center of gravity line passing through the center of gravity of the air cleaner and substantially parallel to the crankshaft, and a front portion of the air cleaner is attached to the bent portion.

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